This Calf Nurser Bottle niopple features a patented air release valve that prevents leakage yet allows air to be released into the bottle as the calf nurses. This design ensures the proper flow of milk through the nipple to the nursing calf. Extra "bumpers" protect the valve for even longer wear. The surface of the nipple has been specially treated to for ease of use.

Also available: Screw-On Lid Only (#270507) and Calf Bottle with Screw-On Lid & Nipple (#270505), both sold separately.